CN115523191B - Design method of guide vane body of tubular pump device for regulating and controlling outlet bias flow - Google Patents
Design method of guide vane body of tubular pump device for regulating and controlling outlet bias flow Download PDFInfo
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- CN115523191B CN115523191B CN202210614853.9A CN202210614853A CN115523191B CN 115523191 B CN115523191 B CN 115523191B CN 202210614853 A CN202210614853 A CN 202210614853A CN 115523191 B CN115523191 B CN 115523191B
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- 238000009826 distribution Methods 0.000 claims abstract description 46
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
The invention discloses a design method of a guide vane body of a tubular pump device for regulating and controlling outlet bias flow, which comprises the steps of obtaining the outlet flow of each guide vane groove of the guide vane body of the tubular pump device under different flow working conditions based on a numerical simulation result of CFD software of the tubular pump device; shifting the guide vane to the side with smaller flow of the guide vane groove outlet according to the average value of the flow distribution ratio of the guide vane groove outlet of the guide vane body under different flow working conditions of the tubular pump device; the improved guide vane body is placed into the tubular pump device, three-dimensional numerical simulation is carried out on the tubular pump device by adopting CFD software, the space distribution and circumferential speed of the water flow at the outlet of the guide vane body are regulated and controlled, so that the flow state of the drift inside the water outlet flow channel is improved, a new technical reference is provided for the optimal design of the guide vane body of the tubular pump device, the probability of occurrence of the bad flow state such as the drift inside the water outlet flow channel of the tubular pump device is effectively reduced, and the efficient operation of the tubular pump device is ensured.
Description
Technical Field
The invention relates to the technical field of improving the bias flow of an outlet of a guide vane body of a pump device, in particular to a design method of the guide vane body of a tubular pump device for regulating and controlling the bias flow of the outlet.
Background
The through-flow pump device is widely applied to the through-flow pump stations in plain areas due to the characteristics of extremely low lift (the lift is lower than 4 m) and large flow. The hydraulic efficiency of the through-flow pump device determines the operating efficiency of the through-flow pump station. The tubular pump device generally comprises four overflow parts of a water inlet flow channel, an impeller, a guide vane body and a water outlet flow channel, the water flow is subjected to rotary work by the impeller to obtain energy, the water flow can have a large speed circulation after flowing out of the impeller, the guide vane body recovers the speed circulation of the water flow at the outlet of the impeller and enables the water flow to stably enter the water outlet flow channel, but the recovery effect of the guide vane body on the speed circulation of the water flow at the outlet of the impeller is obviously different under different running flow working conditions. At present, relevant scholars pass through CFD (Computational Fluid Dynamics) numerical simulation technology and engineering technicians and operate the observation of outlet flow state of the water outlet flow channel through actual pump station, the effect of uneven flow distribution of the outlets of all guide vane grooves and the recovery speed annular quantity of the guide vane bodies when water flows out of the guide vane bodies is limited, the residual speed annular quantity of the water flow of the outlet of the guide vane bodies enables the water flow to deviate to one side in the water outlet flow channel so as to form bias flow, the outlet flow state of the water outlet flow channel is disordered, the outlet flow velocity is unevenly distributed, the hydraulic loss of the water outlet flow channel is increased, the hydraulic efficiency of the tubular pump device is reduced, and the energy consumption of the tubular pump device is increased. Aiming at the condition of uneven flow distribution of the outlet of the guide vane body, the prior art is to adopt a guide vane type guide vane, place the guide vane on the outlet surface of the guide vane body, and connect the tail edge of the guide vane with the front edge of the baffle of the water outlet flow passage, so as to achieve the purpose of effectively controlling the flow bias, but the flow bias is improved by the measures of artificially adding the guide vane, the manufacturing and installation cost of the guide vane is required to be additionally increased, the original structure of the outlet of the guide vane body is complicated, the guide vane is not beneficial to being used in the construction of an actual pump station, and the source problem of uneven flow distribution of the outlet of the guide vane body is not fundamentally solved. In order to effectively solve the problems, the invention provides a design method of a guide vane body of a tubular pump device for regulating and controlling the drift of an outlet, which is used for distributing and controlling the water flow of each guide vane groove at the outlet of the guide vane body while recovering the water flow velocity annular quantity at the outlet of an impeller, reducing the adverse effects of the drift of the water flow at the outlet of the guide vane body on inducing the bad flow state of spiral flow in a water outlet flow passage and increasing the hydraulic loss of the water outlet flow passage, and avoiding the addition of a regulating and controlling device for the drift and the construction quantity of pump station engineering.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The invention is provided in view of the problems of the conventional design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet.
Therefore, the invention aims to provide a design method of the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet.
In order to solve the technical problems, the invention provides the following technical scheme: a design method of a guide vane body of a tubular pump device for regulating and controlling outlet bias flow comprises the following steps,
Based on the numerical simulation result of CFD software of the tubular pump device, obtaining the outlet flow of each guide vane groove of the guide vane body of the tubular pump device under different flow working conditions;
Shifting the guide vane to the side with larger flow of the guide vane groove outlet according to the average value of the flow distribution ratio of each guide vane groove outlet of the guide vane body under different flow working conditions of the tubular pump device;
And (3) placing the guide vane body after transformation into a tubular pump device, and carrying out three-dimensional numerical simulation on the tubular pump device by adopting CFD software.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: and 4 overflow parts are used for constructing a three-dimensional model for the water inlet flow channel, the impeller, the guide vane body and the water outlet flow channel of the tubular pump device, and based on an N-S equation and an RNG k-epsilon turbulence model, the CFD software is adopted for carrying out three-dimensional numerical simulation on the tubular pump device.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: the working conditions under different flow working conditions are selected, three characteristic working conditions are selected, namely a small flow working condition is 0.8Q bep, a design flow working condition is 1.0Q bep and a large flow working condition is 1.2Q bep, wherein: q bep is the design flow operating mode.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: calculating the distribution ratio of the outlet flow of each guide vane groove of the guide vane body and the annular average value of the residual speed of the outlet of the guide vane body under 3 flow working conditions, wherein the flow distribution ratio is the ratio n of the outlet flow of each guide vane groove to the outlet flow of the guide vane body, and solving the average value n i of the distribution ratio of the outlet flow of each guide vane groove.
In formula 1: i represents an ith guide vane groove, i is more than or equal to 1 and less than or equal to b, i is an integer, b is the number of guide vanes, and i is an integer; n Li represents the flow distribution ratio of the outlet of the ith guide vane groove under the high-flow working condition; n Di represents the flow distribution ratio of the outlet of the ith guide vane groove under the design flow working condition; n Si represents the flow distribution ratio of the outlet of the ith guide vane groove under the working condition of small flow.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: the offset arc length alpha is established by establishing the following mathematical model:
wherein, alpha i is the offset arc length; b is the number of guide vanes; n i is the average value of the outlet flow distribution ratio of each guide vane groove; d is the outlet diameter of the guide vane body; pi is a constant, 3.1415926 is taken, and the value of the offset arc length alpha is judged to be positive or negative.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: and taking the residual error convergence accuracy of each physical quantity of the tubular pump device as a convergence basis, and obtaining the flow of each guide vane groove outlet of the tubular pump device under 3 flow working conditions according to three-dimensional numerical simulation of the tubular pump device, and calculating the average value of the flow distribution ratio of each guide vane groove outlet of the guide vane body and the average value of the residual speed annular quantity of the guide vane body outlet.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: and calculating the residual speed annular quantity of the guide vane body outlet, and judging the change of the outlet residual speed annular quantity.
As a preferable scheme of the design method for the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet, the invention comprises the following steps: and a through hole is formed in the inlet side area of the guide vane body.
The invention has the beneficial effects that: the method is used for optimally designing the guide vane body of the tubular pump device so as to realize the regulation and control of the spatial distribution and the circumferential speed of the water flow at the outlet of the guide vane body and improve the flow state of the drift inside the water outlet flow channel, thereby providing a new technical reference for the optimal design of the guide vane body of the tubular pump device, effectively reducing the probability of poor flow state such as drift inside the water outlet flow channel of the tubular pump device and ensuring the efficient operation of the tubular pump device. The invention has strong applicability, convenient application and convenient implementation. The invention has strong applicability, convenient application and convenient implementation.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
The invention discloses a design method of a guide vane body of a tubular pump device for regulating and controlling an outlet bias flow, which is based on a numerical simulation result of CFD (Computational Fluid Dynamics) software of the tubular pump device, wherein the flow of the guide vane body outlet of the tubular pump device under 3 flow working conditions (a small flow working condition is 0.8Qbep, a design flow working condition is 1.0Qbep and a large flow working condition is 1.2Qbep, wherein Qbep is the design flow working condition) is obtained, distribution of the flow of each guide vane groove of the guide vane body under 3 flow working conditions is calculated, distribution proportion of the flow of each guide vane groove of the guide vane body to the outlet flow of the guide vane body is calculated, average value of the distribution proportion of the flow of each guide vane groove under 3 flow working conditions is calculated, the guide vane is deviated to one side with larger flow of the guide vane groove according to the distribution proportion average value of the outlet flow of each guide vane groove, through holes are drilled in an inlet side area of each guide vane of the guide vane body, the inlet side area where the through holes are 1/3-1/2 of the height L of the guide vane, the through holes are arranged into 3-4 rows, the number of through holes in each row is 3-5, and the specific number of through holes in each row is determined according to the size of the guide vane. The method comprises the steps of adopting CFD (Computational Fluid Dynamics) software to perform three-dimensional numerical simulation on a tubular pump device adopting offset guide blades and guide blade bodies with through holes, obtaining the outlet flow of each guide blade groove of the guide blade bodies, calculating the residual speed annular quantity of the outlets of the guide blade bodies, judging that the residual speed annular quantity of the outlets of the guide blade bodies designed by adopting the method is reduced compared with that of the original guide blade bodies, and the distribution ratio of the outlet flow of each guide blade groove is extremely less than 1%.
The technical scheme of the invention comprises the following 3 steps:
The three-dimensional model is constructed for 4 flow passing components of a water inlet flow channel, an impeller, a guide vane body and a water outlet flow channel of the tubular pump device, based on an N-S equation (Navier-Stokes Equations) and an RNG k-epsilon turbulence model (or an SST k-omega turbulence model), the tubular pump device is subjected to three-dimensional numerical simulation by adopting CFD (Computational Fluid Dynamics) software, 3 characteristic working conditions (small flow working conditions 0.8Qbep, design flow working conditions 1.0Qbep and large flow working conditions 1.2 Qbep) of the tubular pump device are obtained by taking residual convergence accuracy of physical quantities of the tubular pump device as convergence basis, flow corresponding to the outlet of each guide vane groove of the tubular pump device under 3 flow working conditions (Qbep is design flow working conditions), the distribution ratio of the outlet flow of each guide vane groove of the tubular body and the residual speed ring quantity average value of the outlet of the guide vane body under the 3 flow working conditions are calculated, the flow distribution ratio is the ratio N of the outlet flow of each guide vane groove to the outlet flow of the tubular body, and the average value N i of the distribution ratio of the outlet flow of each guide vane groove is solved.
In formula 1: i represents an ith guide vane groove, i is more than or equal to 1 and less than or equal to b, i is an integer, b is the number of guide vanes, and i is an integer; n Li represents the flow distribution ratio of the outlet of the ith guide vane groove under the high-flow working condition; n Di represents the flow distribution ratio of the outlet of the ith guide vane groove under the design flow working condition; n Si represents the flow distribution ratio of the outlet of the ith guide vane groove under the working condition of small flow.
And (3) shifting the guide vane to the side with larger flow of the guide vane groove outlet according to the average value of the flow distribution ratio of the guide vane groove outlet of the guide vane body under 3 flow working conditions of the tubular pump device. The offset arc length alpha is determined according to the formula 2, and the guide vane is offset according to the offset arc length after the offset arc length alpha is determined. The offset arc length alpha is positive, which indicates that the offset increases the guide vane groove excess flow volume; the offset arc length α is negative, indicating that the offset reduces the vane slot over-flow volume. Through holes (L is the height of the guide vane body) are arranged in the area below 1/3L-1/2L of the length of the inlet side of the guide vane, the number of the through holes in each row is 3-4, the number of the through holes in each row is 3-5, the diameter of each through hole is 0.05D (D is the inlet diameter of the guide vane body), the horizontal spacing between adjacent through holes is 0.05D-0.1D, and the vertical spacing is 0.05L-0.15L.
In formula 2: alpha i is the offset arc length; b is the number of guide vanes; n i is the average value of the outlet flow distribution ratio of each guide vane groove; d is the outlet diameter of the guide vane body; pi is a constant and is a value 3.1415926.
And (3) placing the reconstructed guide vane body into a tubular pump device, performing three-dimensional numerical simulation on the tubular pump device by adopting CFD (Computational Fluid Dynamics) software, taking the fact that the residual convergence precision of each physical quantity of the tubular pump device is lower than 1.0x10 < -5 > as a convergence basis, obtaining the flow of each guide vane slot outlet of the tubular pump device under 3 flow working conditions according to the three-dimensional numerical simulation of the tubular pump device, calculating the average value of the flow distribution ratio of each guide vane slot outlet of the guide vane body and the average value of the residual speed annular quantity of the guide vane body, and comparing the flow distribution ratio of each guide vane slot outlet of the tubular pump device and the residual speed annular quantity of the guide vane body under 3 flow working conditions, wherein the extremely poor flow distribution ratio of each guide vane slot outlet of the tubular pump device and the average speed annular quantity reduction of the guide vane body outlet are taken as verification bases.
The certain tubular pump device comprises 4 overflow parts of a vertical shaft type water inlet flow passage, an impeller, a guide vane body and a straight pipe type water outlet flow passage. The nominal diameter of the impeller is 0.3m, the number of blades of the impeller is 4, the hub ratio is 0.483, the average value of clearance between blade tops is 0.2mm, the number of blades of the guide vane body is 7, the rated rotation speed is 1433r/min, and the flow working condition is designed (Q bep =338L/s). And adopting UG (Unigraphics NX) software to perform three-dimensional modeling on the vertical shaft type water inlet flow channel and the straight pipe type water outlet flow channel, and adopting ANSYS TurboGrid software to build a three-dimensional model on the impeller and the guide vane body. And (3) grid division is carried out on each overcurrent component of the tubular pump device by adopting ICEM CFD software. And adopting CFD software to carry out numerical simulation on the tubular pump device. Parameter setting: the inlet boundary condition adopts a flow inlet which is arranged at the inlet position of the water inlet flow channel. The outlet boundary condition is that the outlet of the water flow passage is a water outlet section, and defaults to free outflow, and a pressure outlet is adopted. Wall condition setting: the RNG k-epsilon turbulence model is not suitable for flow in the boundary layer of the wall surface, so that the wall surface of a calculation area needs to be processed, and the slip-free wall surface is adopted to ensure the accuracy of numerical simulation. The interface of each flow-through part adopts None, and the interfaces at the two sides of the impeller are constantly calculated to adopt Stage. The residual error convergence accuracy of each physical quantity of the through-flow pump device is lower than 1.0X10 -5. And (3) carrying out numerical simulation on the original scheme tubular pump device to obtain an average value of flow distribution ratios of the outlets of all the blade grooves of the guide blade body and the residual speed circulation of the outlets of the guide blade body in the original scheme.
TABLE 1 flow distribution ratio and deflection arc length of each blade groove of original guide blade
Table 2 flow distribution ratio of each vane groove of guide vane body with optimized design
And obtaining flow distribution ratios of all guide vane grooves of the original guide vane under three characteristic working conditions through CFD numerical simulation, and calculating the average value of flow distribution ratios of outlets of all guide vane grooves through a formula 1, so that deflection arc length alpha is obtained through a formula 2 and is shown in a table 1. According to the technical scheme, through holes are arranged in an area below 71.75mm in length of the inlet side of the guide vane, the number of the through holes in each row is 3, the diameter of each through hole is 7.5mm, the horizontal distance between adjacent through holes is 20mm, and the vertical distance between adjacent through holes is 20mm. After the optimized guide vane body is added into the tubular pump device, the water flow at the outlet of the guide vane body is more uniform, the residual water flow rate circulation of the outlet of the guide vane body of the tubular pump device is reduced by 50.2% compared with that before the optimization, the extremely poor flow distribution ratio of the outlet of each guide vane groove of the guide vane body is less than 1% (table 2), and the drift phenomenon of the water outlet flow channel is not obvious. The invention can improve the hydraulic performance of the water outlet flow passage of the tubular pump device and ensure that the tubular pump device can safely and stably operate.
It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (3)
1. A design method for a guide vane body of a tubular pump device for regulating and controlling outlet bias flow is characterized by comprising the following steps of: comprising the steps of (a) a step of,
Based on the numerical simulation result of CFD software of the tubular pump device, obtaining the outlet flow of each guide vane groove of the guide vane body of the tubular pump device under different flow working conditions;
Shifting the guide vane to the side with larger flow of the guide vane groove outlet according to the average value of the flow distribution ratio of each guide vane groove outlet of the guide vane body under different flow working conditions of the tubular pump device;
Putting the improved guide vane body into a tubular pump device, carrying out three-dimensional numerical simulation on the tubular pump device by adopting CFD software, constructing a three-dimensional model on 4 overflow parts of a water inlet flow channel, an impeller, the guide vane body and a water outlet flow channel of the tubular pump device, carrying out three-dimensional numerical simulation on the tubular pump device by adopting CFD software based on an N-S equation and an RNG k-epsilon turbulence model, selecting working conditions under different flow working conditions, selecting three characteristic working conditions, namely a small flow working condition of 0.8Q bep, a design flow working condition of 1.0Q bep and a large flow working condition of 1.2Q bep, wherein: q bep is a design flow working condition, calculating distribution ratio of outlet flow of each guide vane slot of the guide vane body and annular average value of residual speed of outlet of the guide vane body under 3 flow working conditions, wherein the flow distribution ratio is the ratio n of outlet flow of each guide vane slot to outlet flow of the guide vane body, and then solving average value n of the distribution ratio of outlet flow of each guide vane slot i,
In formula 1: i represents an ith guide vane groove, i is more than or equal to 1 and less than or equal to b, i is an integer, b is the number of guide vanes, and i is an integer; n Li represents the flow distribution ratio of the outlet of the ith guide vane groove under the high-flow working condition; n Di represents the flow distribution ratio of the outlet of the ith guide vane groove under the design flow working condition; n Si represents the flow distribution ratio of the outlet of the ith guide vane groove under the low-flow working condition, and the offset arc length alpha is established by establishing the following mathematical model:
wherein, alpha i is the offset arc length; b is the number of guide vanes; n i is the average value of the outlet flow distribution ratio of each guide vane groove; d is the outlet diameter of the guide vane body; pi is a constant, 3.1415926 is taken, the value of the offset arc length alpha is judged to be positive or negative, the convergence basis is that the residual convergence precision of each physical quantity of the tubular pump device is lower than 1.0x -5, the flow of each guide vane groove outlet of the tubular pump device under 3 flow working conditions is obtained according to three-dimensional numerical simulation of the tubular pump device, and the average value of the flow distribution ratio of each guide vane groove outlet of the guide vane body and the average value of the residual speed annular quantity of the guide vane body outlet are calculated.
2. The method for designing the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet according to claim 1, wherein the method comprises the following steps: and calculating the residual speed annular quantity of the guide vane body outlet, and judging the change of the outlet residual speed annular quantity.
3. The method for designing the guide vane body of the tubular pump device for regulating and controlling the bias flow of the outlet according to claim 1, wherein the method comprises the following steps: and a through hole is formed in the inlet side area of the guide vane body.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182706A (en) * | 2011-05-24 | 2011-09-14 | 扬州大学 | S-shaped downwards horizontal axis-extending tubular pump device |
| CN103711726A (en) * | 2013-12-04 | 2014-04-09 | 中国农业大学 | Tubular pump with part of guide vane body being adjustable |
| CN104636542A (en) * | 2014-12-31 | 2015-05-20 | 扬州大学 | Method for predicting energy performance of pump through adjustable guide vane on basis of CFD |
| CN105975729A (en) * | 2016-06-06 | 2016-09-28 | 扬州大学 | Method for eliminating water outlet flow channel deviation of large-flow inclined axial-flow pump station |
| CN108223386A (en) * | 2017-11-30 | 2018-06-29 | 河海大学 | A kind of large-scale bulb through-flow pump installation |
| CN108223425A (en) * | 2017-11-30 | 2018-06-29 | 河海大学 | A kind of high lift Bulb unit tubular pump |
| CN114396393A (en) * | 2021-11-08 | 2022-04-26 | 江苏大学 | Bulb tubular pump guide vane self-adaptive design method and bulb tubular pump guide vane |
-
2022
- 2022-05-31 CN CN202210614853.9A patent/CN115523191B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182706A (en) * | 2011-05-24 | 2011-09-14 | 扬州大学 | S-shaped downwards horizontal axis-extending tubular pump device |
| CN103711726A (en) * | 2013-12-04 | 2014-04-09 | 中国农业大学 | Tubular pump with part of guide vane body being adjustable |
| CN104636542A (en) * | 2014-12-31 | 2015-05-20 | 扬州大学 | Method for predicting energy performance of pump through adjustable guide vane on basis of CFD |
| CN105975729A (en) * | 2016-06-06 | 2016-09-28 | 扬州大学 | Method for eliminating water outlet flow channel deviation of large-flow inclined axial-flow pump station |
| CN108223386A (en) * | 2017-11-30 | 2018-06-29 | 河海大学 | A kind of large-scale bulb through-flow pump installation |
| CN108223425A (en) * | 2017-11-30 | 2018-06-29 | 河海大学 | A kind of high lift Bulb unit tubular pump |
| CN114396393A (en) * | 2021-11-08 | 2022-04-26 | 江苏大学 | Bulb tubular pump guide vane self-adaptive design method and bulb tubular pump guide vane |
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